Greening sovereign bonds can attract both public and private investment for climate goals and push governments to improve sustainability governance. This blog post shows how sovereign debt can drive the green transition and suggests financial reforms to make it more effective.
The EU taxonomy combined with other tools - such as the EU Green Bonds Regulation (EuGB) - could represent a major change in how policy-makers perceive public finance in Europe and its role in tackling climate change.
The Imperative for Green Sovereign Debt
In these uncertain times, countries need money to fund healthcare, support education, or respond to emergencies. If tax revenues are not enough to cover these expenses, the government can raise the extra funds by borrowing. This is done by selling bonds (debt securities) to investors such as banks, pension funds, foreign governments, or even individual citizens. These bonds are guaranteed to be paid back with a set interest rate at a set date.
Under Article 2 of EuGB, green bonds are defined as bonds where the issuer commits to use the money received from the bond’s sale exclusively for projects that contribute to environmental objectives. All financial actors can issue bonds; however, this blog post focuses on sovereign issuers, as they hold higher credit ratings, manage many green projects, and have the resources for reliable reporting. They are the ones who are expected to lead the green bond initiative.
Strengthening the Foundation: A blueprint
Countries that issue green bonds and perform well on ESG usually have lower default risk and cheaper borrowing costs. Investors see good ESG as a sign of long-term stability, which can help protect against shocks like trade wars or pandemics.
The EuGB framework is currently optional. Governments are currently allowed to issue green bonds without following it, which leads to varying standards, definitions, and environmental rigor across member states. Requiring all sovereign green bond issuances by EU members to comply with the framework would ensure consistency and uphold strong environmental projects in the single market.
Moreover, close compliance with the EU Taxonomy is vital for financing green bonds because it concerns sustainable economic activities. The EuGB Regulation requires the proceeds of these bonds to Taxonomy-compatible activities. Reporting by sovereign issuers under the EuGB could also include more granular and harmonized reporting on the use of proceeds and the environmental impact of projects. Reporting quality and frequency are currently scattered.
A stronger system for enrolling and managing ESG reviewers should be implemented to secure good assessment of sovereign bonds ‘greenness’ and mitigate greenwashing risk. The current situation with ESG third-party verifiers is under threat of conflicts of interest favouring sovereign issuers over retail investors.
With the climate crisis consistently reshaping economic and financial conditions, there is an increasingly strong case for better integration of climate metrics into sovereign debt sustainability assessments. A country's vulnerability to extreme weather, its climate risk, or its readiness to adapt could be part of how experts evaluate fiscal risks.
More attention could be paid to how countries manage their natural capital (forests, water, biodiversity), as most economies depend directly on the well-being of their ecosystems.
Fostering the Growth of the Green Sovereign Debt Market
The EU Next Generation EU Green Bond Programme, launched in 2021, is one of the world's largest green bond programmes. The EU expects to raise up to €712 billion by 2026.
While the EU does not offer direct financial incentives to member states to conduct green bond issues, its funding for sustainable activities can act as an indirect incentive, especially to those with less developed capital markets.
To accelerate the issuance of sovereign green bonds, the EU could extend assistance by providing guidance on the use of the EU Taxonomy for public expenditure, leveraging the optional templates for ESG bonds and improving comparability through standardised reporting of impact.
One noteworthy example is France. This year, the French Market Regulator (AMF) issued one of the first bond prospectuses under the EuGB standard. By leveraging France’s initiative, the EU could create a forum where some member states also could provide technical assistance and share best practices with member states lacking institutional capacity.
Tackling Greenwashing and Ensuring Credibility
Greenwashing is a critical issue in the sovereign debt market, issuers might present projects as more environmentally friendly than they are. Clear accountability mechanisms and sanctions at the EU level for sovereign issuers found to be engaging in greenwashing could represent a solution. Strengthening the supervisory framework for the EuGB and verifiers could be a step towards accountability.
Investor-driven incentives can also improve sovereign green bond reporting. The EU could reward governments that provide high-quality, transparent impact data by offering preferential inclusion in green bond indices, easier access to EU climate funds, and lower borrowing costs through targeted bond purchases.
The EU as a Global Leader: Brussels Effect bis
The EU could leverage the Brussels Effect to establish global standards for green sovereign debt, just as it has done in data protection and competition law. By including high standards in its Green Bond Standard and EU Taxonomy, as well as promoting a legal framework for international harmonisation, the EU can export its regulatory model globally.
